There have been "heads-ups" for specific reunions such as Phantoms and Jag Mates but no bashes specifically for the Mil forum that I recall. PerSec and Nosy Plod being the reasons, for Serving members, I'd guess.
A few current Mil guys have quietly (?!) attended some of the annual Pprune Christmas bashes.
WTF is Clipsham BTW?

If a Michelin starred Pub, does that mean it does solids?